Hi Natalie! Great choice with the Apollo SA4705-720APO. To install it, first, ensure power is off, then mount the detector on the base, making sure it clicks into place. Connect the wiring per the manual – typically, you’ll have power, ground, and communication wires. Once wired, power up the system and confirm the detector is properly addressed. Perform a system test to verify functionality. If you encounter any issues, feel free to ask for more assistance!